1220203 has 2 divisors, whose sum is σ = 1220204.
Its totient is φ = 1220202.
The previous prime is 1220171. The next prime is 1220239. The reversal of 1220203 is 3020221.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1220203 - 25 = 1220171 is a prime.
It is a super-2 number, since 2×12202032 = 2977790722418, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 1220203.
It is not a weakly prime, because it can be changed into another prime (1220803) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101 + 610102.
It is an arithmetic number, because the mean of its divisors is an integer number (610102).
21220203 is an apocalyptic number.
1220203 is a deficient number, since it is larger than the sum of its proper divisors (1).
1220203 is an equidigital number, since it uses as much as digits as its factorization.
1220203 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 24, while the sum is 10.
The square root of 1220203 is about 1104.6279916786.
The cubic root of 1220203 is about 106.8588992309.
Adding to 1220203 its reverse (3020221), we get a palindrome (4240424).
The spelling of 1220203 in words is "one million, two hundred twenty thousand, two hundred three".